Negative multiplication

1. SELF INNOVATIVE LESSON PLAN
NAME OF TEACHER :VEENA GOPAL V S
NAME OF SCHOOL :ST.THOMAS HIGHER SECONDARY SCHOOL
SUBJECT : MATHEMATICS
UNIT :NEGATIVE NUMBERS
SUB UNIT :NEGATIVE MULTIPLICATION
STANDARD :VIII
DIVISION :A
STRENGTH :36
DURATION :40 min
CURRICULAR STATEMENT
To learn about negative multiplication
CONTENT ANALYSIS
Terms: negative, subtract
Facts : (i) multiplication is the continuous addition
(ii) −푎 + −푎 = −(푎 + 푎)
Concepts : The concept of negative multiplication
Principle: 푥. (−푦) = −(푥. 푦) for all positive x and y
Process: The process of teaching learning negative multiplication.
Process skills: calculation, observing.

2. LEARNING OUTCOMES
The pupil :
i. Remembers the above facts, concepts related to negative multiplication.
ii. Develops understanding on the above facts, concepts related to negative multiplication.
iii. Applies the above facts, concepts in new and relevant situations.
iv. Discriminates the above facts, concepts related to negative multiplication.
v. Detects the above facts,concepts related to negative multiplication.
vi. Designs a new idea related to negative multiplication.
vii. Develops skill related to negative multiplication.
viii. Create interest related to negative multiplication.
Pre requisites : multiplication, addition of numbers.
Learning aids: chart, bangles, activity box etc.
INTERACTION PROCEDURE EXPECTED PUPIL RESPONSE
Introduction
Teacher asks what is 6-4?
Also what is 4-6?
Is 2-3 = 3-2?
We studies the above said facts in VII class.
Today , we will study a new concept.
2
-2
No

3. Before that shall we play a game?
Activity
Teacher divides the class into 6 groups.
Teacher presents a box of bangles.
The bangles are shuffled and kept inside the box.
Teacher says :
I will give the box to each group, you have to take a bangle from the
box, without looking. There are 3 chances for each group.
If you take a green one, you will get 10 points and if you take a red
one you will lose 5 points.
Shall we start?
Teacher presents a chart.
Yes
Students actively listens to teacher.
Students actively take part in the
activity
Students fill the chart

4. GROUPS 1 CHANCE 2 CHANCE 3 CHANCE
I
II
III
IV
V
How will you find the points of each group?
Suppose, group I took G G R
G = 10
G = 10 + 10 = 20 points
R = 20 – 5 = 15 points
Total = 15 points
Now group II took R R G
A red bangle = -5 points
When another red bangle is taken,
-5 + -5
= - (5+5) = -10
And then a green bangle ,
= -10 + 10 = 0
We write 5 + 5 = 2 X 5 right?
So,, what is -5 + -5 = ?
-5 + -5 = 2 X –(5)
= -10
10
20 points
15 points
Students listens to the teacher
-10

5. Now what is 3 X (-5)?
= (-5) + (-5) + (-5) = -15
Did you got the concept?
3 X (-5) = - (3 X 5)
= -15
Now what is 4 X -5=?
-(4X5) = -20
Enrichment activity
Find (-4) X (5) X (4) ?
Review
What is 4 X (-5) =?
What is 7 X (-2) =?
Follow up activity
Home assignment
1. 3 X (-6)
2. 4 X (-7)
3. 7 X (-6)
-15
Yes
-20
-14